Code Library › Volume 1 › Section 9.23 — Wood Frame Construction
PART 9 — HOUSING AND SMALL BUILDINGSUpdated for the 2024 Ontario Building Code

9.23.13.3.Requirements for Extreme Wind and Seismic Forces

(1) Except as provided in Articles 9.23.13.1. and 9.23.13.2., this Article applies in locations where (a) the seismic spectral acceleration, Sa(0.2), is (i) greater than 1.8, (ii) greater than 0.70 and the lowest exterior frame wall supports more than 2 floors in buildings of light construction, or (iii) greater than 0.70 and the lowest exterior frame wall supports more than 1 floor in buildings of heavy construction, or (b) the 1-in-50 hourly wind pressure is equal to or greater than 1.20 kPa. (2) Bracing to resist lateral loads shall be designed and constructed in accordance with (a) Part 4, or (b) good engineering practice such as that provided in CWC 2014, “Engineering Guide for Wood Frame Construction.”
← Previous9.23.13.2. Requirements for High Wind and Seismic ForcesNext →9.23.13.4. Braced Wall Bands (See Note A-9.23.13.4.)

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Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.